Il A heavy ball with a weicht of 100 N (m 10.2 kg) is hung. from the ceiling of a lecture hall on a 4.5-m-long rope. The ball. is pulled to one side and released to swing as a pendulum, reach-. ing a speed of 5.5 m/s as it passes throuoh the lowest point.
Inventions. The huochong gun was invented in China during the Ming dynasty. It was also called the tongjiangjun, which meant bronze general. This was an important invention of the time period because the Ming Dynasty was creating weapons to defend their dynasty, and they came across the gun.t was also called the tongjiangjun, which meant bronze general. This was an important invention of the time period because the Ming Dynasty was creating weapons to defend their dynasty, and they came across the gun.
Chinese writing has changed very little since its development during the Shang Dynasty. The Shang's writing system was used throughout the empire and helped unify the empire. Shang Dynasty Achievements - Bronze. The Shang and the Zhou dynasties are often referred to as the Bronze Age of China. Bronze casting was perhaps the greatest technology of the Shang Dynasty. The people of this period took bronze craftsmanship to an amazing level. The Shang people used bronze to make objects ranging from jewelry to weapons. Numerous beautiful works of art made with bronze during the Shang Dynasty have been discovered. Bronze objects were created by sculpting an object and then making a mold of it. Molten bronze was then poured into the mold. When the bronze hardened the mold was broken and the bronze piece was removed.